Dr. Zooper answers questions about life's ordinary puzzles, such as why homework disappears or how a song gets stuck in one's head, by identifying and describing different kinds of Mischievians.

Alek and Deryn encounter obstacles on the last leg of their round-the-world quest to end World War I, reclaim Alek's throne as prince of Austria, and finally fall in love.

Julie welcomes all lost and homeless creatures into her house, whether they be cats or trolls, ghosts or dragons, but soon realizes that each must have a chore in order for the arrangement to work.

After many, many years of being alone, a Nobble finally finds a friend.

Imaginative and adventurous Katrina eludes her maniacal guardian to help Morty, a member of a vanishing breed of zorgles, with his quest to uncover the fate of the fabled zorgles of Zorgmazoo as well as of other creatures that seem to have disappeared from the earth.

Young wizard prince Xar, who has no magic, and warrior princess Wish, an outcast, team up on an adventure that brings them to witches long believed to be extinct.

Accompanied by his aunt's Norwegian elkhound, Ibsen, twelve-year-old Samuel ventures into a weird forest filled with strange and dangerous creatures to rescue his younger sister, Martha, who has been mute since their parents' recent death.

Teagan leaves her flesh and bones behind to join Finn in hunting the uncanny creatures that have spilled from Mag Mell into Chicago, realizing that she must destroy the Dark Man and his minions once and for all to save her remaining loved ones.

Each year, eight beautiful girls are chosen as Paper Girls to serve the king. It's the highest honor they could hope for... and the most cruel. But this year, there's a ninth girl... and she's made of fire. Lei is a member of the lowest and most oppressed class in Ikhara. She's forced to go with the royal guards after her golden eyes pique the king's interest. Forced to learn the skills and charm that befit being a king's consort, Lei does the unthinkable--...

In an alternate 1914 Europe, fifteen-year-old Austrian Prince Alek, on the run from the Clanker Powers who are attempting to take over the globe using mechanical machinery, forms an uneasy alliance with Deryn who, disguised as a boy to join the British Air Service, is learning to fly genetically engineered beasts.